Blind rivet hand tool



l March 6,1945., B G. CARLSON 2,370,840

BLIND RIVE'T HAND TooL Filed oct. 8, 19.43

v INVENTOR.

itTM/Vir a Whew-51 UNITED STATES PATENT OFFICE BLIND mvs'r HAND 'rooL `Bert G. Carlson, Eri'eside, Ohio, assigner, by mesnc assignments, to Jack & Heintz, Inc., Cleveland Ohio, a corporation of Ohio i Application October 8, 1943, Serial No. 505,509

. 2 Claims.

This invention relates to improvements in means for expanding rivets vand has for its-primaryobiect to provide a manually operable blind rivet set. b'y the use of which the rivet may b e insertedin an appropriate hole in the pieces to ,be riveted together, the rivet expanding tool inserted `in the rivet and after simple expanding operation be removed from the rivet for subsev quent expanding Operations on other rivets.

' With this inmind, it is proposed to provide a -rivet expanding tool to include a spindle with an Yenlarged head at one end to retain a removable rubber `sleeve with metal washers on either end, and a convenient rack and hand lever actuated pinion for moving the spindle longitudinally so as to force' the rubber'sleeve to uniformly expand the rivet. In this manner the operation tegral with the body portion Illxis a handle I2' to which is rotatably secured'at I3 a pinion I4 with its operating lever I5. This pinion meshes with a rack I6 which is integral with bushing l-I. A

separate cap piece I1 is also screw threaded ilzo the top of the spindle to. move with bushing In operation, and as viewed in Figure 1, the

rubber. sleeve 'I is connedbetween the enlarged head 6 and the lower end of barrel 9 around the spindle 5 aswell as 'the rivet 3 through which l it protrudes.

of'the hand lever in the opposite direction will allow the removal of the tool lfrom the rivet'.

With the foregoing and other objects in view,

the invention resides in the combination of parts and in the details of construction hereinafter set forth in thefollowing specification and appended claims, certain embodiments thereof being illustrated in the accompanying drawing, in which:

Figure l is a view in'vertical section taken through the tool, rivet and two adjoining pieces to be riveted together, and showing the tool inserted in the rivet prior to expansion of the latter Figure 2 is a view of the tool partly in elevation andpartly 'in vertical section, showing the sleeve distorted and the rivet dared; and Figure 3 is a view. in vertical section of the ilared rivet and showing the tool partly in elevation and partly in vertical section and the tool,

its spindle and sleeve removed fro'm the-flared rivet.

Referring more particularly to the drawing, the two'pieces to be riveted together are shown at I and 2.- -The invention having more primarily to do'with blind riveting,it may be assumed that the underneath side ofl piece 2 is inaccessible. By means of the tool to be described the rivet I, -to be ared, may be inserted into a hole extending through pieces I and 2 until its flange l rests on piece I. Y

.The tool includes a spindle 5 with an enlarged head I tov retain a removable rubber sleeve l. In order to prevent undue wear, the rubbersleeve preferably has vulcanized to each end a metal washer Spindle 6 is slidable within a barrel 8 screwed to a body portion I0 in which a bushin! Ily is slidably mounted and to which latter the vsph-lillois screw threadedly attachedi- In- A downward pressure on lever I 5, which may .be conveniently ,applied -by squeezing lever I8 and handle I2 with one hand, rotates pinion I 4 clockwise which actuates rack I8 upwardly and consequently draws the spindle upwardly.Y The result of such movement is to distort the rubber sleeve by placing itunder compression .in the l smaller vertical space between head 6 and barr'el 9. The rubber sleeve, having no avenue of escape, exerts an outward force on the rivet and bows the main portion thereof, as shown in Figure 2, which represents the position of the assembly when the rivet has been fully expanded and piecesl and 2 completely riveted together.

This having beenaccomplished, the tool may l beremoved by rst. rotating lever I5 counterclockwise which through the rack and pinion forces the spindle downwardly and thus relieves the vertical clamping pressure of barrel 9 and `head 6 on the rubber sleeve 1 until it resumes its original normal shape, as shown in Figures 1 and 3 while the rivet remains flared as shown in Figures 2 and V3. The tool, having beenv removed,

as'shown in Figure 3, is then in readiness for subsequent operation on other rivets. The purpose of the screw threaded adjustability' or barrel 9 in the bodyportion I0 is to adjust the normal distance between the barrel and head t in order to predetermine the expansion of the rivet and the dimensions of 'the rubber sleeve for proper rivet ilaring operations.

By reason of the simple, effective, quick-acting and readily removable'l tool, each rivetjmay be quickly flared, the tool removed and the operation .repeated on other rivets regardless ofthev blind and inaccessible nature of rivet location.

1. A tool for compressing and Haring a blind hollowrivet having one'preformed flared end and its other end straight and unared to hold two pieces of material together comprising -a spindle withan enlarged head insertable through the rivet. a rubber sleeve sndable on said spindle and" of a normal diameter substantially equal to that o said head to be retained thereby against movematerial together and retain the same in such relationship.

2. A tool for compressing and flaring a blind hollow rivet having one preformed ared end and its other end straight and unared to hold two pieces of material together comprising a spindle with an enlarged head insertable through the rivet, a rubber sleeve slidable on said spindle and of a normal diameter substantially equal to that of said head to be retained thereby against movement in one direction on said spindle, a two-part longitudinally adjustable body portion to slidably receive said spindle and abut the preformed ared end of the rivet, a rack slidably mounted in said body portion and screw-threadedly connected to said spindle, a pinion rotatably mounted on said body portion to mesh with said rack and having a manually operable lever for rotating the pinion in one direction for drawing said spindle head upwardly to predeterminedly deform said sleeve and thus expand and are the under, or blind, portion of said rivet to forze said two pieces of material together and retain the samein such relationship, said lever upon a manual turning in the opposite direction being adapted to release the pressure of said spindle head on said rubber sleeve permitting the latter to resume its normal diameter so that the rubber sleeve and the spindle head may be removed from the ared rivet.

BERT G. CARLSON. 

